Btrfs: fix BUG_ON in btrfs_submit_compressed_write
This is similar to btrfs_submit_compressed_read(), if we fail after
bio is allocated, then we can use bio_endio() and errors are saved
in bio->bi_error. But please note that we don't return errors to
its caller because the caller assumes it won't call endio to cleanup
on error.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 658c39b..7a4d9c8 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -402,7 +402,10 @@
}
ret = btrfs_map_bio(root, WRITE, bio, 0, 1);
- BUG_ON(ret); /* -ENOMEM */
+ if (ret) {
+ bio->bi_error = ret;
+ bio_endio(bio);
+ }
bio_put(bio);
@@ -432,7 +435,10 @@
}
ret = btrfs_map_bio(root, WRITE, bio, 0, 1);
- BUG_ON(ret); /* -ENOMEM */
+ if (ret) {
+ bio->bi_error = ret;
+ bio_endio(bio);
+ }
bio_put(bio);
return 0;
